Journal
ELECTROCHIMICA ACTA
Volume 259, Issue -, Pages 86-93Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.10.168
Keywords
L-cysteine; Fe2O3 nanotubes; Mild steel; Water splitting
Categories
Funding
- National Natural Science Foundation of China [51301199]
- China University of Petroleum (Beijing) [2462015YQ0602]
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This work has reported a simple, environmental-friendly, low-cost and relatively high efficient method of L-cys @ Fe2O3 NTs photoanode preparation. The designed specimen was composed of hematite nanotubes obtained by electrochemical anodization on mild steel, which surface was covered by L-cysteine thin layer. With the overlayer, the water oxidation photocurrent of hematite increased approximately sixfold (1.23 V vs RHE (reversible hydrogen electrode) under 1 sun illumination). To reveal the enhanced PEC performance, multiple analyses including the sample surface morphological and chemical properties, optical and electronic properties, and photoelectrochemical properties were explored. The combined results suggested that L-cys @ Fe2O3 NTs photoanode presented more efficient hole migration pathway, lower interfacial resistance, and superior surface stability than pure nanostructured hematite. (c) 2017 Elsevier Ltd. All rights reserved.
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